C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
	int i,n,j;
	cin>>n;
	for(i=1;i<=n;i++){
		cout<<setw(n-i)<<"";
		for(j=1;j<=i*2-1;j++){
			cout<<i;
		}
		cout<<endl;
	}
	return 0;
} 

Pascal :

var a,b,i,c,j,k:longint;
begin
read(a);
b:=0;
for i:=a downto 1 do
begin
for j:=1 to b do
write(' ');
b:=b+1;
c:=i*2-1;
for k:=1 to c do
write(i);
writeln;
end;
end.

Java :

import java.util.Scanner;
public class Main{
public static void main (String[] args){
	Scanner sc = new Scanner(System.in);
	int n = sc.nextInt();
	for(int i = 1; i <= n; i++) {
		for(int k = 1; k <= i-1 ; k++) {
			System.out.print(" ");
			
		}
		
		for(int j = 1; j <= 2 * n -(2 * i - 1) ; j++) {
			System.out.print(n + 1 - i);
		}
		System.out.print('\n');
	}

}
}

Python :

n = int(input())
for i in range(1, n + 1):
    for j in range(1, i - 1 + 1):
        print(' ', end='')
    for j in range(1, 2 * (n - i) + 1 + 1):
        print(n - i + 1, end='')
    print()